Tenjou Renka: Kin no Oujo to Hi no Kusushi

A princess from the Golden Kingdom, named Aila, travels to the Song Dynasty capital during King Huizong's rule to serve as a goodwill envoy for her royal family. During her journey, she is ambushed by assassins and saved by Rinshi, a young fireworks artisan from the Song Dynasty. She develops feelings for him upon first meeting. Meanwhile, discussions arise about a potential marriage alliance between her and the ninth prince of the Song Dynasty, known as King Kang.